We hurried all the way to the airport ,only that the flight had been calledoff because of the foggy weather .

The story showed marriage between people of different races ,_____ was against the law at that time.

If not _____, you can return everything on the spot and no further duties when you purchase goods at wwwamazoncn[ ]

I have no idea ____________ measures the government will take to stop the river from being further polluted.

It’s getting dark. We’d better ________ in a hotel for the night.[ ]